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arXiv 1006.4441cond-mat.mtrl-sciphysics.comp-ph
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碳材料注氢的分子动力学与二元碰撞近似混合模拟

Hybrid Simulation between Molecular Dynamics and Binary Collision Approximation Codes for Hydrogen injection onto Carbon Materials

Seiki Saito, Atsushi M. Ito, Arimichi Takayama, Takahiro Kenmotsu, Hiroaki Nakamura

摘要:

采用改进的Brenner反应经验键级(REBO)势的分子动力学(MD)模拟是研究核聚变装置偏滤器板上等离子体壁相互作用的有力工具。然而,MD模拟盒的尺寸小于几个纳米的计算机的性能。为了扩展MD模拟的规模,我们开发了一个混合的模拟代码之间的MD代码使用REBO势和二进制碰撞近似(BCA)代码。使用BCA代码代替计算MD模拟中每一步的所有具有高动能的粒子,节省了相当多的计算时间。通过对氢原子注入石墨的模拟实验,发现该混合模拟程序在大型模拟箱中也能有效地工作。

英文摘要:

Molecular dynamics (MD) simulation with modified Brenner's reactive empirical bond order (REBO) potential is a powerful tool to investigate plasma wall interaction on divertor plates in a nuclear fusion device. However, MD simulation box's size is less than several nm for the performance of a computer. To extend the size of the MD simulation, we develop a hybrid simulation code between MD code using REBO potential and binary collision approximation (BCA) code. Using the BCA code instead of computing all particles with a high kinetic energy for every step in the MD simulation, considerable computation time is saved. By demonstrating a hydrogen atom injection on a graphite by the hybrid simulation code, it is found that the hybrid simulation code works efficiently in a large simulation box.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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